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Dollar General Corp

Here are some of the items that will shape the week ahead on Wall Street: Costco talks about its quarter past, and its dividend to come; Dollar General is raking them in; homebuilders report; zombies give a late boost to video games, and Hobbits give a late boost to movie theaters.

If you're taking meds for say, high cholesterol, you can now pick up your Lipitor prescription from a licensed pharmacist at a local dollar store -- if you live in the right place. Could the trend spread?

Dollar stores are luring a lot more consumers these days, and their rock-bottom prices aren't the only reason: The chains have undergone major makeovers in recent years, sprucing up their dingy digs and adding better merchandise.